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Go to YouTube "Sprag Clutch" and there are some videos of how this unit works. Older IHC Scouts had a Warn locking front hub system that had "Open" "Lock" and "Auto" settings that used a sprag. In "Auto" you got 4 wheel drive only when the rear wheels spun faster than the front, thereby...

This is exactly what happened to me, only issue with M939 series is that it is a Automatic Transmission so pull start was not a option How long did you have that battery one you replaced, was it a original that came with the truck? I've owned the truck since August, 2010 and have no knowledge...

M817 with 4 batteries did the exact same thing. Stopped for fuel and no start. Pull started it and drove it to my shop. All terminals were clean and well connected. I did a battery load test with each battery isolated and one battery failed. Replaced that battery and no problems since. In your...

If you use a lug nut and washers as above, put the lug nut on backwards, tapered side away from the hub.

I can't side by side compare the M929 with the M817, but when we received the 939 series replacements for our 809 series trucks in Germany 1985-1987, the soldiers universally liked the 5 speed standard transmission better.

Interesting thread, lots of good ideas. Step one of any engine troubleshooting should be to have fully charged known good batteries. After charging, load test. 12 volt battery is fully charged at 12.6 VDC. Load test to one half the CCA for 15 seconds. At 70 degrees F the voltage should not drop...

http://www.steelsoldiers.com/showthread.php?84909-Snow-plow-on-817-(Now-that-winter-is-almost-over)&highlight=snow+plow I had this done in 2012. I plow a gravel road and move slowly. No problem to date. Chains on all 6, gravel on back to make weight at 42,000 lbs.

I would do an individual battery test. Open circuit should be 12.6 VDC or above. 1/2 the CCA load for 15 seconds and the battery should not drop below 9.6 VDC at 60 degrees F. 13 volts does not mean the battery has the volume, amps, needed to work. On my 817 one low reserve battery (of 4) will...

I don't remember all the combinations of linkage adjustments I went through to get my 817 dump to engage and disengage, but it took a lot of tinkering. There is not a lot of motion needed in the pump to get it to work correctly. Before I got it fixed, I drove it 20-some miles with the pump...

When I previewed the post, they were there. Now I get an attachment notice. If I click on the yellow line, the pdf files download and can be opened. I'm not a computer expert, but hold my own. Posting pictures on this site is a challenge.

Cleaning up the road shoulders in our subdivision. Members plow with pickups till there is build up, then we hit the snow. One pass uphill, one pass down.

My M817 became hard to start and had a very bad idle. It would surge and slow down; nearly died. I suspected that it was sucking air but there were no telltale wet spots on any of the fuel lines. I finally found several very small leaks by pressurizing the lines with air and the fuel would weep...

I just read this post so if it is OBE'd (overcome by events) please excuse me. I have an M817 and never had any crank or electrical start problems. One day after working it several hours, I shut it down to refuel and upon restart attempt I got only a solenoid engage clunk. I shorted the solenoid...

Mijon, Check posts #80 and #85. Most of what you asked is there. I live in a subdivision on he east side of a 7000' pass. This year seems to be a big snow year. I have wanted a camoflaged money pit for a while. Rationalized buying the truck if I found a plow. Well a 12 foot Wausau showed up at a...

KORNDOG, I posted this in Hotrodding. Should explain everything. http://www.steelsoldiers.com/showthread.php?84909-Snow-plow-on-817-(Now-that-winter-is-almost-over)&highlight=snow+plow+817

Working For A Living February in Montana. M817 with a 12 foot Wausau plow. Chains on all 6, 14000 lbs of gravel for ballast. I try real hard not to get stuck.

Not necessarrily a solution, but in the mid 80's there was a worldwide flood of substandard improperly graded bolts from China that found their way into US manufacturing and repair parts supply systems. I was an Ordnance Officer in !st Armored Division and we deadlined nearly all of our new 939...

Agree with all of the above ref batteries. Batteries provide "pressure" = volts and "volume" = amps. You can have correct voltage without correct amps available. They will pass a voltmeter check and not even click a solenoid, and one guilty battery will cause the failure. (experience here and a...

Whenever you are going under the raised bed for any reason, prop it up with the braces on both sides of the frame.

Ed, I own an 817 but it is loaded w/ roadmix to help plowing and it is muddy underneath so I can't respond to the locking mechanism part of your question. I had a similar problem and it turned out to be worn dump lever linkage that I fixed by adjustment. The TM helped, but my success came from...